Toothbrush



Feb- 8 1927- D. J. BEYNoN T'ooTHBRUsH Filed Oct. 6. 1926 l PatentedFe'bl s, 1927. e,

'UNITI-D is TATES f 1,616,484 PA'ljE'Nvr' omer..

' nAyIEL J. ramon', or cnrc'AGo, tumors".

TQQTHBRUSH.

Application mea october e,

rluhis invention relates to a brush designed primarily for the orushingof teeth, although it may possibly be applied-advantageously to otheruses as well. i

For its objects the invention aims to pro'- vide in an article of thiskind three brushing units tw'o of which are associated yieldingly witheach other, so that the three sets of brushes may operate simultaneouslyt clean the teeth upon their grinding surfaces and upon their contiguousinner and outer surfaces as well. It aims also to mount Athese severalbrushing units in a compact fstruct-ure with which is swivelly connecteda handle by which the device in its entirety may be manipulated withease. bjects such as these, as well as others which will hereinafterappearare realized froml my inyention, a suggestive embodiment whereofis illustrated in the accompanying drawing in lthe'manner following:

Figure 1 is a plan view of theibrush structure in its entirety;

Fig. 2 is a longitudinal section taken on line v2---2 of Fig. 1; and

. Fig. 3 is a transverse section taken on line 3-3 of Fig. 2.

In the present brush may be comprised a pair of backs 4 and 5 inwhich-are mounted bristles 6 and 7, respectively, and constituting twoof thel brushing lunits. The two brush backs may each be inwardlyoifsetas at 8 and then upwardly extended and brought together in the form ofinterlapping joints 9 through which is extended a hinge pin 10. Iutilize also a third brush unit having a back 11 provided with joints 12which' interlap the other joints 9. The hinge pin` 10 is extended alsothroughthe joints of this last unit in which are carried bristles 13. Itwill be noted that the ends of the bristles in this third unit terminateadjacent Ithe other sets of bristles 6 and 7 "which are extended towardveach other, as best shown in 7 Fig. Y Formed on the back 11 is a base14 having a threadedisocket to receive a screw 15 which affords a swivelconnection for a handle .16.

- By the means described the handle is free to i and 5 are further urgedtoward each other and toward the third back 11 as by means of i 192e.seriai no. 139,808. f

a wire Jspring 1 7, which may be coiled about vthe base 14 andA hingepin 10 in such almanner as to present its opposite endswith pressureagalnst the.` two brush backs 4 and 5.

'The' back 11 thus forms a stop for the two backs 4 and 5. I

The brush of this invention is well adapted for o eration upon theteeth, as appears plainly 1n Fig. 3. When put to use, the

bristles 6 A.and 7 ,will engage with the inner and outer surfaces of theteeth while the other bristles 13 will' perform work upon the grinding'surfaces thereof. The brush inits entirety may be moved back and forthwith the aid ofthe handle 16. lDue to the swiveled connection 15 the.device will turn in conformity with lthe curvature ofthe teeth as thebrush is moved along the row of teeth l1n the mouth. As irregularitiesor variations occur in the'thickness of the teeth the two brush units 4and 5 may yield, as required, the-ends of their bristles being heldalways in close contact with the` teeth due to the pressure exerted bythe spring 17.

'lhe present brush maybe made of any suitable' material such ascelluloid, bone,

vbakelite, metal, etc. The backs of its two units 4 and 5 may also berounded in a 10ngitudinal direction, as shown in Fig. 1, so

as to better conform to the curvature of the teeth within the mouth.The' bristles are readily accessibleJfor cleaning, and'because o'f thesturdy construction employed, the

'brush may be depended upon to perform satisfactorily over an extendedperiod of time. Iclaim: 1. A tooth brush having a pair of hingedlyconnected units with spring means tending to move them towardeach-other, 'a third interposed unit hingedly connected with the others,and brush elements extending inwardly from each ot the three `units andterminating jadjacent each other to provide brushing surfacesadapted tooperate simultaneously upon theA inner, outer, and grinding surfaces ofthe teeth, substantially as described.

2. A tooth brush having a pair of hingedly connected units with springmeans tendv ing to move them toward each other, a third interposed unithingedly connected with the others, brush elements extending inwardlyfrom each of the three units and. terminating adjacent; each other toprovide brushing surfaces adapted to. operate'simultanesurfaces of theteeth, and a handle having' ingA adjacent each other to provide brushfv-f ing surfaces ofA the teeth, substantia ly as ously upon the inner,outer, and grinding a swivel connection with one unit whereby the entirebrush may be rotatively manipulated, substantially as described.

3. A tooth brush having a pair of hinged-l .ly connected units withspring means tending to movethem towardeach other, a third interposedunit hingedly connected with the others and stopping their inwardmovement,

andi brushing elements extending inwardly from each of the three unitsand terminating .surfaces adapted to operate simulta` neously upon theinner, outer, and inddescribed.

4. A tooth brush in which is combined a handle, a brush unit swivellyconnected thereto, and a pair of other brush unitshingedly connected toeach other and tothe unit, and

rst brush unit, each brush unit including cleaning elements terminatingin three planes such as to adapt the device for operation upon inner,outer, and grinding surfaces of the teeth, and tension means urging thtwo opposite brush units toward each ot er, substantially as described.

5. A tooth brush in which is combined a. pair of hingedly connectedbrush units having bristles extended toward but 'stopping short ofeachother, a third brush unit the brush units for manipulating the-olevice, substantially as described.

4,DAN'IELQL BEYNoN.

